science

An object with a mass of 21 kilograms is lifted through a distance of 7 meters. How much work is done A. 147j B.703n c.15,625N

  1. 👍 0
  2. 👎 0
  3. 👁 135
  1. Work = F*d = mg*d = 210 * 7 = 1470 J.

    1. 👍 0
    2. 👎 0
    posted by Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physical Science

    Two objects were lifted by a machine. One object had a mas of 2 kilograms, and was lifted at a speed of 2 m/sec. The other had a mass of 4 kilogram was lifted at a rate of 3 m/sec. ------------------------------------------- a)

    asked by Jinja on September 26, 2017
  2. Math

    The density, d, of an object is given by the following formula, where m represents the mass of the object and V represents the volume of the object. Heather was asked to find the density of a brick given the mass in kilograms and

    asked by Josh on September 8, 2014
  3. math

    if the force acting on an object stays the same, then the acceleration of the object is inversely proportional to its mass.If an object with an mass of 64 kilograms accelerates at a rate of 3 meters per second by a force, find the

    asked by adam on March 3, 2009
  4. Physics

    mass of star = 3.80 x 1030 kilograms mass of planet = 6.35 x 1024 kilograms mass of moon = 7.63 x 1022 kilograms average distance from star to planet = 1.56 x 1011 meters average distance from planet to moon = 4.26 x 108 meters

    asked by Nick on December 15, 2008
  5. Physics

    Which object had more potential energy when it was lifted to a distance of 10 meters?

    asked by Anonymous on February 26, 2015
  6. physics

    A force of 1.35 newtons is required to accelerate a book by 1.5 meters/second2 along a frictionless surface. What is the mass of the book? 0.45 kilograms 0.90 kilograms 1.35 kilograms 1.5 kilograms 1.8 kilograms

    asked by jerome rice on October 27, 2014
  7. Science

    Object E has a mass of 4,800 kilograms. Object F has a mass of 600 kilograms. Both objects were placed on different planets so that their weights are equal. The gravity acting on Object E is ________ times the gravity acting on

    asked by Anonymous on November 2, 2017
  8. pre-calc

    The force, F, between two bodies of mass m1 kilograms and m2 kilograms whose centers of mass are a distance of r meters apart is given by the formula F = (Gm1m2)/ r2 where G is the gravitational constant of the universe. What are

    asked by Math on September 30, 2016
  9. physics

    A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 × 104 meters. If the truck's mass is 7,000 kilograms, what is the work done to reach this distance?

    asked by saluma on February 4, 2015
  10. physics

    an object explode and a to 2 kilograms piece moves north at 4 m/s and a 4 kilograms piece moves East at 1.5 meters per second. What is the momentum of the third piece? What is the mass of the third piece if it moves at a speed of

    asked by Breona on December 7, 2014

More Similar Questions